{"id":34824,"date":"2016-11-29T12:37:26","date_gmt":"2016-11-29T07:07:26","guid":{"rendered":"https:\/\/www.cbselabs.com\/?p=34824"},"modified":"2021-09-18T15:26:34","modified_gmt":"2021-09-18T09:56:34","slug":"to-study-the-variation-in-potential-drop-with-length-of-a-wire-for-a-steady-current","status":"publish","type":"post","link":"https:\/\/www.cbselabs.com\/to-study-the-variation-in-potential-drop-with-length-of-a-wire-for-a-steady-current\/","title":{"rendered":"To Study The Variation in Potential Drop With Length of a Wire For a Steady Current"},"content":{"rendered":"

To Study The Variation in Potential Drop With Length of a Wire For a Steady Current<\/strong><\/span><\/h2>\n

Aim<\/strong><\/span>
\nTo study the variation in potential drop with length of a wire for a steady current.<\/p>\n

Apparatus and material<\/strong><\/span>
\nApparatus. Potentiometer:<\/strong>
\nMaterial:<\/strong> A fully charged 4.5 V battery or battery eliminator, a low resistance rheostat, a voltmeter of range (0-3.0 V), an ammeter (0-3) A, a one way key, a jockey, a set square, connecting wires and a piece of sand paper.<\/p>\n

Theory<\/strong><\/span>
\nFor a potentiometer with wire of uniform material density and thickness (cross-sectional area) carrying a steady current, potential drop is proportional to the length of the wire.
\n\"to-study-the-variation-in-potential-drop-with-length-of-a-wire-for-a-steady-current-1\"
\nwhere K is the drop of potential per unit length. It is called the potential gradient.<\/p>\n

Diagram<\/strong><\/span>
\n\"to-study-the-variation-in-potential-drop-with-length-of-a-wire-for-a-steady-current-2\"<\/p>\n

Procedure<\/strong><\/span><\/p>\n

    \n
  1. Draw a circuit diagram showing the scheme of connections as in figure.<\/li>\n
  2. Remove the insulation from the ends of the connecting copper wires with a sand paper.<\/li>\n
  3. Connect the positive pole of the battery (eliminator) (a battery of constant e.m.f.) to the zero end (P) of the potentiometer and the negative pole through a one-way key, an ammeter and a low resistance rheostat to the other end (Q) of the potentiometer.<\/li>\n
  4. Connect the positive terminal of the voltmeter to the end P of the potentiometer and the negative terminal to the jockey.<\/li>\n
  5. Touch the end of the jockey to the end Q of the potentiometer.<\/li>\n
  6. Close the key and set the rheostat such that the voltmeter gives full scale deflection (3 V).<\/li>\n
  7. Touch the jockey at end P at 0 (zero) cm. The voltmeter will give zero deflection.<\/li>\n
  8. Touch the jockey at marks separated by 50 cm length of wire. Note the voltmeter reading in each case.<\/li>\n
  9. Record your observations in tabular form as given ahead.<\/li>\n<\/ol>\n

    Observations and\u00a0Calculations<\/strong><\/span>
    \n\"to-study-the-variation-in-potential-drop-with-length-of-a-wire-for-a-steady-current-3\"
    \n\"to-study-the-variation-in-potential-drop-with-length-of-a-wire-for-a-steady-current-4\"<\/p>\n

    Calculation from\u00a0graph<\/strong><\/span>
    \nPlot a graph choosing a suitable scale, for the values of potential drop V along y-axis and length l\u00a0along x-axis as shown in figure.
    \n\"to-study-the-variation-in-potential-drop-with-length-of-a-wire-for-a-steady-current-5\"
    \n\"to-study-the-variation-in-potential-drop-with-length-of-a-wire-for-a-steady-current-6\"<\/p>\n

    Result<\/strong><\/span>
    \n\"to-study-the-variation-in-potential-drop-with-length-of-a-wire-for-a-steady-current-7\"<\/p>\n

    Physics Lab Manual<\/a>NCERT Solutions <\/a>Class 12 Physics Sample Papers<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

    To Study The Variation in Potential Drop With Length of a Wire For a Steady Current Aim To study the variation in potential drop with length of a wire for a steady current. Apparatus and material Apparatus. Potentiometer: Material: A fully charged 4.5 V battery or battery eliminator, a low resistance rheostat, a voltmeter of …<\/p>\n","protected":false},"author":27,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spay_email":""},"categories":[2],"tags":[],"yoast_head":"\nTo Study The Variation in Potential Drop With Length of a Wire For a Steady Current - CBSE Labs<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.cbselabs.com\/to-study-the-variation-in-potential-drop-with-length-of-a-wire-for-a-steady-current\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"To Study The Variation in Potential Drop With Length of a Wire For a Steady Current\" \/>\n<meta property=\"og:description\" content=\"To Study The Variation in Potential Drop With Length of a Wire For a Steady Current Aim To study the variation in potential drop with length of a wire for a steady current. 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